1212342401 has 2 divisors, whose sum is σ = 1212342402. Its totient is φ = 1212342400.

The previous prime is 1212342379. The next prime is 1212342409. The reversal of 1212342401 is 1042432121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1059177025 + 153165376 = 32545^2 + 12376^2 .

It is an emirp because it is prime and its reverse (1042432121) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1212342401 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1212342409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606171200 + 606171201.

It is an arithmetic number, because the mean of its divisors is an integer number (606171201).

Almost surely, 2^1212342401 is an apocalyptic number.

It is an amenable number.

1212342401 is a deficient number, since it is larger than the sum of its proper divisors (1).

1212342401 is an equidigital number, since it uses as much as digits as its factorization.

1212342401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 1212342401 is about 34818.7076296637. The cubic root of 1212342401 is about 1066.2894154963.

Adding to 1212342401 its reverse (1042432121), we get a palindrome (2254774522).

The spelling of 1212342401 in words is "one billion, two hundred twelve million, three hundred forty-two thousand, four hundred one".